Calculate the time required to cover 90 km at the speed of 30km/hr.?
A car covers a distance of 400km at a certain speed. Had the speed been 12 km/hr more, the time taken for the journey would have been 1 hour 40minutes less. Find the original speed.
Abirami has covered some distance with a speed of 20 km/hr in 5 hrs. And then some more distance in another 5 hrs, with a speed of 30 km/hr. Find the average speed for her entire journey.